Polycarp doesn't like integers that are divisible by 3 or end with the digit 3 in their decimal representation. Integers that meet both conditions are disliked ...
You are given n integers a_1, a_2, ldots, a_n . Find the maximum value of max(a_l, a_{l + 1}, ldots, a_r) cdot min(a_l, a_{l + 1}, ldots, a_r) over all pair...
Highway 201 is the most busy street in Rockport. Traffic cars cause a lot of hindrances to races, especially when there are a lot of them. The track which passe...